Patent US2909112A successfully refreshed from Google Patents.
US2909112A
Expired / Lapsed
US
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Air diffuser
Assignee: Individual
•
Filing: 1956-08-07
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Granted: 1959-10-20
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Expires: 1976-08-07
Abstract
No abstract record available.
Inventors
- 👤 Hrant H Yousoufian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:52
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2116873A
Cited
US2220594A
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US2017728A
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US2222081A
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US2341439A
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US2381345A
Cited
US2472748A
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US2636668A
Cited
US2748659A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-19 | 1963-04-20 | 1963-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-19 | 1967-04-20 | 1967-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-19 | 1971-04-20 | 1971-10-20 | $7700.00 | Window Closed / Lapsed |